--- a/dom/tests/mochitest/pointerlock/file_pointerlock-api.html
+++ b/dom/tests/mochitest/pointerlock/file_pointerlock-api.html
@@ -70,21 +70,17 @@
           window.addEventListener("contextmenu",
                                   function() { gotContextMenuEvent = true; },
                                   true);
           synthesizeMouse(document.body, 4, 4,
                           { type: "contextmenu", button: 2 },
                           window);
 
           document.addEventListener("mousemove", mouseMoveHandler);
-          requestAnimationFrame(() => {
-            setTimeout(() => {
-              synthesizeMouseAtCenter(div, {type: "mousemove"}, window);
-            }, 0);
-          });
+          synthesizeMouseAtCenter(div, {type: "mousemove"}, window);
         } else {
           info("Got pointerlockchange for exiting");
           pointerUnlocked = true;
           addFullscreenChangeContinuation("exit", function() {
             info("Got fullscreenchange for exiting");
             runTests();
             SimpleTest.finish();
           });